First post here for a new member. I am in love with this car, can't believe I waited this long to purchase a BMW. Planning on buying tires in the spring and thought I would go for a different look on the wheels. Have not been in a car that drives this good and dont want to screw up the dynamics, can not decide on factory size of 19wheels or step up to the 20inch. Does anyone have experience with the differences in ride between the two. The look is perfect with the 20's, just dont want to deteriorate the ride too much. Thanks